<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>盒子边框</title>
    <style>
        div{
            width: 300px;
            height: 200px;
            background-color: rgb(216, 139, 152);
            /* 边框会影响盒子的实际大小 颜色 粗细 虚实 */
            /* border-color: rgb(24, 119, 228);
            border-width: 5px;
            border-style: solid; */
            /* 复合写法 */
            border: lightskyblue 5px solid;
            /* 合并相邻边框 */
            border-collapse: collapse;
            /* 内边距会影响盒子的实际大小 */
            padding: 0px;
            
        }
    </style>
</head>
<body>
    <div>

    </div>
</body>
</html>